The tenants who attach their antennae on the cell tower uses transceivers and other supporting equipment installed in cabinets or in shelters. Wireless carriers have their own ways of protecting their equipment.
Some places outdoor cabinets on concrete pads while others used prefabricated equipment shelters. There are multiple antennas attached on a cell tower and they are typically mounted on a head frame. Sometimes only a few as three antennas are mounted while some cell towers have as many as fifteen antennas per carrier. The number of antennas depends on the technology, antenna performance, coverage, and capacity required.
Cell towers have utilities installed at the site to be used by the carriers. Each initial carrier usually has power run to the site as well as phone service. Each cell tower or cell site will require access by the carriers for both initial installation and ongoing maintenance or repair activities. These may require a separate track to the mobile tower site.
We've all driven past them so many times, but have you ever actually wondered how they work? How They Work Whether it's handling simple phone calls or 12Mbps WiMax data, cell sites are organized with more or less the same flow:.
They resort to wireless either when they don't have a ground connection, or when the ground connection sucks. If you are moving, then there's a handoff—a new but more or less identical cell site transmits the data to your phone, once your phone checks in and says "I'm here. The Gear Clearwire, who gave me the tour of the cell site during my WiMax test run , is a new company, only just now deploying their network, one that is only focused on data, and not on voice calls.
This means they don't have a bunch of sites already established like other carriers though their recent acquisition by Sprint may change this. But it also means their cellular gear is modern and compact compared to the others. The backup batteries must be enormous, because there's a sign on the door that says, "Danger - Corrosive Liquids - Wear Protective Equipment.
Clearwire, by comparison, has a high-school locker for its gear—one that is built somewhere else and just trucked to the location. A group of cell towers in a specific area are connected by wires to a central point called a Mobile Switching Center MSC. As you can imagine, there are thousands of MSCs around the world — all interconnected by wires — each with many cell towers that are part of each of their particular network.
Your Home MSC stores information such as your service plan, your current location, and your activity status. When your cell phone is on, it is not in airplane mode, and it is within range of a cell tower, that cell tower recognizes your phone using RF signals.
Remember Using a Walkie-Talkie? Words Into Wires? Contact us if you would like to learn more about how cell towers work.
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